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We consider a thin elastic sheet in the shape of a disk that is clamped at its boundary such that the displacement and the deformation gradient coincide with a conical deformation with no stretching there. We define the free elastic energy as a variation of the von K'arm'an energy, that penalizes bending energy in with (instead of, as usual, ). We prove ansatz free upper and lower bounds for the elastic energy that scale like , where is the thickness of the sheet.

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